code: def forward(self, samples, contains_labels=False):
      if not self.transformer:
          self.transformer = TaggedTransformer(self.features)
      return self.transformer.transform(samples, contains_labels)
  
file_path: underthesea/underthesea/models/crf_sequence_tagger.py
imports: from os.path import join
  from pathlib import Path
  import joblib
  import pycrfsuite
  from underthesea.transformer.tagged import TaggedTransformer
label_desc: Use image node_id 2 for calling the CRFSequenceTagger obj's underlying member method code with example usage: obj.forward(samples, contains_labels) and returns: self